# Fourth generation effect on $Λ b$ decays - High Energy Physics - Phenomenology

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Abstract: The rare decays of $\Lambda b$ baryon governed by the quark level transitions$b \to s$, are investigated in the fourth quark generation model popularlyknown as SM4. Recently it has been shown that SM4, which is a very simpleextension of the standard model, can successfully explain several anomaliesobserved in the CP violation parameters of $B$ and $B s$ mesons. We find thatin this model due to the additional contributions coming from the heavy $t-$quark in the loop, the branching ratios and other observables in rare$\Lambda b$ decays deviate significantly from their SM values. Some of thesemodes are within the reach of LHCb experiment and search for such channels arestrongly argued.

Author: R. Mohanta, A.K. Giri

Source: https://arxiv.org/